Franklin Park, IL: what USGS's seismic model says

Franklin Park carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Franklin Park in the 38th percentile nationally for seismic hazard - higher than 38% of the 4,875 US cities USGS was checked against here.

Franklin Park by the numbers

The raw figures: peak ground acceleration 0.061g, short-period spectral response 0.121g, 1-second spectral response 0.063g. Among 330 Illinois cities in this dataset, Franklin Park ranks 225 for seismic hazard, the 32th percentile within the state. About 18,110 people live in Franklin Park, Illinois.

Retrofit economics for Franklin Park

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Illinois. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Franklin Park address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Franklin Park's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.